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73 lines
2.4 KiB
73 lines
2.4 KiB
// Copyright (c) AlphaSierraPapa for the SharpDevelop Team |
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// |
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this |
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// software and associated documentation files (the "Software"), to deal in the Software |
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// without restriction, including without limitation the rights to use, copy, modify, merge, |
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons |
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// to whom the Software is furnished to do so, subject to the following conditions: |
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// |
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// The above copyright notice and this permission notice shall be included in all copies or |
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// substantial portions of the Software. |
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// |
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR |
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE |
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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// DEALINGS IN THE SOFTWARE. |
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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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internal static class DotNet35Compat |
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{ |
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public static string StringJoin<T>(string separator, IEnumerable<T> elements) |
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{ |
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#if DOTNET35 |
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return string.Join(separator, elements.Select(e => e != null ? e.ToString() : null).ToArray()); |
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#else |
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return string.Join(separator, elements); |
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#endif |
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} |
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public static IEnumerable<U> SafeCast<T, U>(this IEnumerable<T> elements) where T : class, U where U : class |
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{ |
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#if DOTNET35 |
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foreach (T item in elements) |
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yield return item; |
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#else |
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return elements; |
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#endif |
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} |
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public static Predicate<U> SafeCast<T, U>(this Predicate<T> predicate) where U : class, T where T : class |
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{ |
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#if DOTNET35 |
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return e => predicate(e); |
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#else |
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return predicate; |
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#endif |
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} |
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#if DOTNET35 |
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public static IEnumerable<R> Zip<T1, T2, R>(this IEnumerable<T1> input1, IEnumerable<T2> input2, Func<T1, T2, R> f) |
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{ |
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using (var e1 = input1.GetEnumerator()) |
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using (var e2 = input2.GetEnumerator()) |
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while (e1.MoveNext() && e2.MoveNext()) |
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yield return f(e1.Current, e2.Current); |
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} |
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#endif |
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} |
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#if DOTNET35 |
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namespace System.Diagnostics.Contracts { } |
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namespace System.Threading |
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{ |
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internal struct CancellationToken |
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{ |
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public void ThrowIfCancellationRequested() {} |
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} |
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} |
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#endif
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